Elevator-door mechanism.



J. BROMBAGHER.

ELEVATOR DOOB. MECHANISM.

APPLICATION FILED FEB. 4,1908.

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UNITED STATES FATENT rrron.

JULIUS BROMBAOHER, OF LOS ANGELES, CALIFORNIA, ASSIGNOR TO P. MARTIN DEOROUPE'I, OF LOS ANGELES, CALIFORNIA.

ELEVATOR-DOOR MECHANISM.

Specification of Letters Patent.

Patented Dec. 22, 1908.

Application filed February 14, 1908. Serial No. 415,988.

To all whom it may concern:

Be it known that I, JULIUs BROMBAOHER, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Elevator-Door Mechanism, ofwhich the following is a specification.

The main object of the present invention is to provide an elevator doorwith means for convenient operation thereof in opening and closing.

A further object of the invention is to pro vide means for such purposewhich will ease off or relieve the jar in opening and closing the door.

Another object of the invention is to provide, in a double elevatordoor, convenient and simple means for simultaneous operation of the twodoors.

In the accompanying drawings: Figure 1 is an elevation of a doubleelevator door embodying the invention. Fig. 2 is a horizontal sectionthereof on line 00 2 Fig. 1. Fig. 3 is a vertical section on line as -mFig. 2. Fig. 4 is a vertical section on line m -ac Fig. 2. Fig. 5 is avertical section on line m ac Fig. 2. Fig. 6 is an elevation of a singleelevator door showing application of the invention thereto.

1 designates a portion of the framing of an elevator shaft and 2 a fixedanel or wall portion partly closing the sha t at one side, eaving anopening or doorway at that side.

3, 4 designate elevator doors which are adapted to move across saidopening, being, i

for example, mounted on trucks 5 running on a rail 6, these doors beingadapted to move alongside of the fixed panel 2 when in open position,for example, in front of said panel, that is, toward the side at whichthe operator stands. The doors 3 and 4 are operated by a lever 7fulcrumed at 8 on a supporting member 9, said lever being connected by alink 10 with the door 4 and having an operating connection with the door3 by a device 11 connected to the lever 7 and moving in a guide-way 14formed on the door 3, the said guide way may be formed by a bar 12attached to the door 3 by spacing blocks 13 and screws, the bar 12extending parallel to the door and forming a guide way etween the barand the door. The device 11 preferably consists of a spool or rollermounted to turn on a stud 15 attached to the link 10 and passing throughthe lever 7, this stud forming a pivotal connection for the link and thelever. A washer 16 extends between the spool 11 and the lever 7 and theouter end of the lever is bent over and down to extend in front of link10 and is provided with a handle 17 for manual operation. The lowerspacing block 13 is preferably covered with rubber or other yieldingmaterial 25 which acts as a buffer for the spool 11 at the end of itsdownward movement.

The member 9 on which the lever 7 is fulcrumed is yieldingly mounted soas to provide a floating or yielding fulcrum with elastic resistance tomotion in either direction. Said member 9 is preferably in the form of arocker arm and has a sleeve 22 mounted to turn on a stud 21 which studis secured to a fixed support 20, the latter being attached to the panel2. A coil spring 24 is secured at one end to the fixed support 20 and atthe other end to the member 9 so as to normally hold said member incentral position, but to allow it to yieldingly rock in eitherdirection.

The operation is as follows :--Nhen the doors are closed, the lever 7and the link 10 are extended horizontally, as shown in full lines inFig. 1, so that the doors are locked against operation by direct push onthe door. When the doors are to be opened the handle 17 is liftedturning the lever 7 upwardly and causing the member or roller 11 to runup in the guide way 14, thereby drawing the first door 3 to openposition. At the same time, the lever 7 and the link 10 act as a toggle,and the opening of this toggle by the raising of lever 7 causes theouter end of the link 10 to be drawn inwardly, opening the second door4. As the doors are fully opened the jar due to the stoppage of theirmotion is taken up by yielding fulcrum 8, the spring 24 allowing themember 9 to turn slightly under the pressure of such jar. "When the dooris to be closed, the lever 7 is pushed down, straightening the toggle 7,10 so as to close the outer door and causing the roller 11 to traveldownwardly in guide 14 thereby closing the first door. As this operationis completed the jar is taken up by the yielding fulcrum, the member 9turning slightly in the reverse direction.

It will be noted that with this construction a single yielding devicetakes up the jar, due to stoppage, of both doors and the number of partsis reduced to a minimum and an easy, smooth operation is iven to bothdoors.

In case only a singde door is used, the link 10 will be omitted as shownin Fig. 6, the connecting member or roller 11 being attached to lever 7and said roller working up and down in guide way 14 to operate the door.The lever 7 is, in this case, also pivoted on a yielding fulcrum 8, 9,constructed as shown in Fig. 3.

The invention is described as applied to the landing doors of anelevator, but it will be understood that it can be applied to slidingdoors of any kind and in any situation.

What I claim is 1. A door operating mechanism comprising, in combinationwith a plurality of doors and a fixed frame, a supporting memberyieldingly mounted 011 the fixed frame, a lever pivoted to saidsupporting member, a link connecting said member with one of the doors,guide means on the other door, said lever provided with means engagingin said guide, means to operate the latter door and having its free endextended beyond said first means and adapted to engage with the linkwhen the doors are closed.

2. A door operating mechanism com rising, in combination with a door anda ixed frame, a pivot on the frame, a spring pressed rocking member onthe pivot, a lever connected to the rocking member, guide means on thedoor, and a shouldered stud on the lever for engaging said guide meansto operate the door by the movement of the lever, said stud beingadapted to have a link pivotally secured thereto at one end.

3. In a door operating mechanism, comrising, in combination with a doorand a fixed frame, a supporting member yieldingly mounted on the fixedframe, guide means on the door, a lever pivoted to the yieldingsupporting member, a stud near the free end of the lever, a spool on thestud for engaging in said guide means to operate the door, the outer endof the stud being adapted to have a link pivotally secured thereto.

4. A door operating mechanism comprising, in combination with aplurality of doors, a fixed frame, a pivot thereon, a sleeved rockingmember on the pivot, a lever connected to said member, a link connectingsaid lever with one of the doors, guide means on the other door, andmeans connected to said lever and engaging in said guide means tooperate said other door.

5. In a door operating mechanism, a plurality of sliding doors, avertical guide on one door, a frame, a lever having a pivotal connectionat one end with theframe, means connected to the lever and sliding alongthe guideway to operate the door as the lever is swung, a link having apivotal connection with the other door and having a pivotal connectionwith said means, the lower end of the guide being on a line with the twoextreme pivotal connections to hold the lever and link in a horizontalposition at right angles to the guide when the doors are shut.

In testimony whereof, I have hereunto set my hand at Los AngelesCalifornia this 7th day of February 1908.

GEORGE T. HAoKLEY, FRANK L. A. GRAHAM.

